List six things that QWidgets have in common.

What is a dialog? Where is an appropriate place to use it?

What is a QLayout? What is its purpose? What is an example of a concrete QLayout class?

Can a widget be a child of a layout?

Can a layout be a child of a widget?

Can a layout be a child of another layout?

What are the advantages of listing your images in a resources file?

What is the difference between a spacer and a stretch?